- Chuck the watermelon into a blender and give it a quick blend. If you like, you can strain the juice to remove the seeds but this is not essential. Either way, pour the juice into a jug.
- Add the lime, sugar, tequila and Cointreau to the jug with the watermelon and mix well.
- Put a sprig of mint into four glasses and fill with ice. Pour over the cocktails and serve immediately.
1 kg peeled watermelon, cut into chunks
The juice of 4 limes
4 tsp caster sugar
60ml Cointreau or orange juice
4 springs mint
Plenty of ice to serve